IG-88 is one of the
bounty hunters seen on the the Star Destroyer Avenger's
bridge in The Empire Strikes Back. I based this mostly
on Joel Keuster's IG-88, with a different head and it's also all
grey. I used a pair of grey Battle Droid arms for his, and two 1x1
grey cylinders stacked up for each leg, and a red dot for its eye
sensor. It stands just under six bricks high.